Stenciling-machine.



PATENTED AUG. 28, 1906.

H. M. G ROWELL. STENOILING MACHINE.

APPLIQATION FILED MAY 9, 1906.

2 SHEETS-SHEET 1.

III! l/ l III/l II lIIIII/I'l I I I II [I m" Hllll 15' M771 ass as my 7 By 6/ 8 ZV/Orr/ No- 829,573. PATENTED AUG. 28, 1906. H. M. GROWELL.

STBNOILING MACHINE.

APPLIOATION FILED MAY 9, 1906.

2 SHEETSSHEET 2.

1727268808 jhvgrfizk 4432 9%26M I UNITED. STATES PATENT OFFIO'E'.

HENRY M. CROWELL, OF MAPLEWOOD, NEW. JERSEY, ASSIGNOR TO UNQERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y.,' A

CORPORATION OF NEW' JERSEY,

STENClLlNG-MACHINE;

Specification of Letters Patent.

Patented Aug. 28, 1906.

Application filed May 9,1906, Serial No. 315,934.

, of which the following is a specification.

ThlS invention relates to duplicating-machines in which a perforated hollow cylinder or drum is covered with'anink-blanket and a stencil-sheet is laid upon the blanket, the paper to be stenciled being run between the stencil-sheet and a pressure-roll, the ink being applied to the interior of the cylinder and taken up by the ink-blanket upon the exte rior thereof.

The objects of my invention are to provide effective, simple, inexpensive, and easily operated means for securing upon the cylinder both the ink-blanket and the stencilsheet, to provide means for-securing a stoparm and handle upon the open end of a stenoil-cylinder, so that the arm and handle may be adjusted around the cylinder to secure different depths of top margin, upon the paper sheets, and to provide improved means detail of the means for adjustin the res-.

sure-roll. Fig. 4 is a detail of t e yie ding stop for setting the stencil-cylinder for taking a fresh sheet of paper. Fi 5. is a detail showing the manner of attac g the handle and stop-arm to the edge of the stencil-cylinder. Fig. 6 shows a latch which releasably holds the pressure-roll under tension. Fig. 7 shows a portion of the devices seen at Fig. 2, the pressure-roll being released from the stencil-cylinder. Fig. 8 illustrates'the manner of releasing the bar which clamps the stencil-sheetupon the cylinder.

Figf9 is a cross-section o the upper portion of the cylinder, showing the manner of securing the ink-blanket thereon. Fig. 10 is a plan of the bar which secures the stencil-sheet'upon the cylinder. v

Upon a base 1 are erected opposite standards or end frames 2 3. A stencil-cylinder 4, having the usual perforations annular head 7, running upon trundles 8 9 10, provided upon the frame 3. A soft-rubber ro1l'1-1 is pressed up against the under side of the cylinder in the usual manner, said roll usually having a shaft 12, mounted in suitable pressurearms, (indicated at 13.) The shaft or journal 6 is hollow, and a thumbscrew 14 passes axially through said journal and is threaded into a hub 15, located centrally of the cylinder 4 and supported upon spokes 16, radiating from the hub to an annular flange 17, forming one head of the cylinder. The journal 6, which is rigidly secured by said screw to said hub, is provided with a shoulder 18, and a bearing 19 upon the standard 2 is fitted between said shoulder and the head whereby endwise play of the cylinder is prevented. To detach the cylinderfrom the machine, it is only necessary to withdraw the thumb-screw 14 and slide the cylinder to the 'right, at Fig. 1, until the flange or tread 20 at the other end of the cylinder is clear of the trundles 8 9 10, whereupon the cylinder may be lifted from the machine.

The ends ofan ink-blanket 21, which is wrapped around the cylinder, are caught upon a pair of rods 22, which are located in a ,draw the same downwardly to tension the ink-blanket 21.

The ends of the stencil sheet 27 are con- .fined in the depression 23 by means of a bar 28, which fits so closely in the depression as to clamp both the stencil-sheet and the inkblanket. Said bar 28 is preferably longer than the beam 24 and is provided at one end a fork 29, Fig. 10, to catch beneath the portion of the thumb-screw 14,.

5, has at one end a shaft 6, ournaledin the standard 2, and

at the other end is provided with an open or dGEiGSSlOH 23, formed'in the periphery of the claw 30, secured inthe head 17 of the cylinder,

' 1 said claw preferably having a stem 31 threaded into the head 17, Fig. 8. At the other end the clamping-bar 28 is provided with a longitudina-lperforation 32 to receive the inner end of a locking-pin 33, the latter having a handle 34, whereby it may be pressed in to lock down the bar 28, Fig. 1. When it is desired to insert a new stencil or a new ink-blanket,

the bar 28 may be readily'detached from-the.

machine, Fig. 8. The pin 33 passes through a hole 35, formed in the head 7, to aline with 1 the hole 32 in the bar.

The arms or levers pressure-roll 11, are connected bya bar 36, and the tension in the pressure-roll is regulated by means of a cam'37, provided'upon the shaft 38 and bearing about midway of the.

bar-315;- Supported upon said shaft-is an arm 39, 'caug t by a latch 40. Upon releasing the latch the arm 39 flies up and the roll' 11 drops from the cylinder; Fig. 7. A worm- Wheel 41 is secured upon the shaft 38 by a set-screw-42, and aworrn 43 is pivoted in a pair ofears 44 and provided with a knurledead =45,= whereby to turn the worm. The

ears-44 are formed upon a cylindricalcasing with said cured arh'andle 47; by means of thumb screws 48,which are threaded into'a bracket 49, the latter having claws 50 to engage an annular $0676 51; formed in the outer'edge of the or head 7 of the stencil-cylinder, the screwsbearin at their-inner ends against a washer '52.; he bracket 49 has an integral arnr49 to therouter end ofwhich said handle 47 is attached, Fig.5, and a spur 53, projecting from thebackiof the arm 49, hooks over a-flange 54, provided upon the eriphery of the :head- 7 at its outer edge. U 49" is provided a yielding stop 55 to cooperate with a fixed stop 56, provided upon the framework for determining the position of thestencil-cyliiider when a paper-sheet is to be introduced between thelatter and the pressurerell: =1 1. Any suitableyielding stop 55 may be employed. Preferably thestop 1S imtheform of a short rod mounted in a housh1g5? lup'on the arm 49. A compressionspring: 58, confined in said housing, bears against 'aeollar 59 uponthe-stop to force the 55.projects at its-otherlatterout The re end from the housingl it. cannot drop back intothe slot, thus silencin the-step 55 when desired-J 13, support the.

ponthe arm and is providedwith a e same may be drawn out'oi its slot '61 and turned around, so that ass sts scope ofthe invention and portions of the improvements may be used without others.

Having thus. described my invention, I

1. In a stenciling-rnachine, a stencil-cylink der having a depression in its periphery, a pair of rods extending longitudinally of the cylinder in said depression for attachment to the stencil-blanket, and screws threaded into the cylinder and having heads to catch over the rods.

. 2. In a stenciling-machine, a stencil-cylinder comprisin a pair of heads, a beam connecting said eads, a perforated sheet secured upon said heads to form a hollow cyl- I in said depression for securing the ends of the stencil-sheet.

4. In a stenciling machine, a stencil-cylinder provided with a longitudinal. depression inits hery, and having in' said depresen sion a her or securing the ends of the'stencilsheet, and means detachably securing the ends of; the bar; said securing means including a'claw beneath which one end of the bar may be inserted, and a fastening device mounted upon the cylinder for the other end of the bar.

- 5. In a stenciling machine, a stencil-cylin.

in its periphery, and having-in said depressionmeans for securing the. ends of the stencil-sheet, and means detachablysecuring the ends of the bar; said securing means including a claw beneath which one end of the bar may be inserted, and a fastening device mounted upon the cylinder for the other end of the bar said fastening device in the form of a pin having a handle and passing through holes in the cylinder and bar.

6. In a stencilirg-machine, a stencil-cylinder open at one-en at said end upon its eriphe on the other end of the cy l thumb-screwth'readed into said huh, a' hollow ournal" upon said screw, said hollow journal having a shoulder and ti 'dly secured by said screw tosaid hub, and a 'earing upon the framework in which said -hollow journal turns, said bearin fitted closely between said shoulder and t s head of said screw, so as to prevent endwise play-of the cylinder.

8. In a stenciling rnachine, the combina' :0 -tion with a stencil-cylinder having an open end, and an interior groove at said open end, a handle having a pair of claws fitting in said groove, and also having a clawjcatching over an exterior flange formed upon the cylinder,

f5 and screws to cooperate with said claws to bind the'handle wherever adjusted, and cooperating stops, one upon the'handle and the other upon the framework;

9. In a stenciling-machine, the combination with a stencil-cylinder having aniopen zo end and both interior and exterior flanges at said open end, of a handle having means to catch over said flanges, a screw to secure the handle wherever adjusted around the cylinder, and cooperative stops, one upon the han- 25 dle, and the other uponlthe framework.

HENRY M. CROWELL. Witnesses:

S. T. SMITH, Jr., I B. C. STICKNEY. 

